[mythtv-users] HDHR failing

[James Linder]

On 14 Nov 2020, at 1:38 pm, faginbagin <mythtv at hbuus.com> wrote:
> 
> On 11/13/2020 7:46 PM, DryHeat122 wrote:
>> 
>> On Fri, Nov 13, 2020, 3:07 AM David Watkins <watkinshome at gmail.com <mailto:watkinshome at gmail.com>> wrote:
>> [snip]
>> 
>> 
>>    ..or you could have a faulty Ethernet cable/connector or network switch.  To know how to troubleshoot this you need to understand your network a bit.
>> 
>> 
>> Possible, but everything was working fine for a couple months then stopped working, and it's only mythbackend that can't access it.
>>  
>> 
>> 
>>    How is your backend connected to the HDHR?  Wi-Fi or wired?  What other things are on the network?
>> 
>> 
>> Both are wired.  Other things on the network are the normal things, a desktop, a couple phones, a few echos, some smart switches.
>>  
>> 
>> 
>>    What IP address do the HDHR and mythbackend have, and how are they assigned?  They can be manually assigned or they can pick them up from a device running DHCP (usually either a wifi access point or your ISP's broadband modem/gateway).
>> 
>> 
>> Backend has a static IP (198.168.1.200) HDHR has a DHCP address (198.168.1.42, currently). 
>> 
>> One sort of odd thing is that the HDHR is not showing up on the client list on my router.  However, like I said it works with other devices, I can ping it from the backend, and nmap shows it's up, connected, and working fine.
> 
> If your cable modem is providing DHCP services to your network and you haven't power cycled your HDHR since the cable modem was restarted, then power cycling the HDHR will allow it to renew its DHCP lease with the cable modem, and might help mythbackend find the HDHR. I would first power cycle the HDHR, then restart the mythtv-backend service.

I don't dispute, but. I would like to ask why. Thw 'windows' solution of reboot palls.

You reboot the modem
The HDPR has a valid ip. (you can ping it)
At some point the lease expires, so the HDPR does a REQ for the same ip.
Either the modem ACKs and grants it or NAKs, some further negotiation happens and the HDPR gets an ip.
In what way is the mythbox privy to the HDPR-modem transactions.

what I'd do is this

Other devices work.
Run other SW on your myth box. I can't recall what I used, I definitely used something, maybe a browser, maybe VLC.
If that works you have a myth problem, if it works not you have a conectivity issue.

James